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PHP arsort() Function

Last Updated : 11 Jul, 2025
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The arsort() in PHP is used to sort an array according to values. It sorts in a way that relation between indices and values is maintained. By default it sorts in descending order of values. Syntax: 
bool arsort( $array, $sorting_type )
Parameters: This function accepts two parameters as mentioned above and described below:
  • $array: This parameter specifies the array which to be sort. It is a mandatory parameter.
  • $sorting_type: This parameter specifies name of a user-defined function which will be used to sort the keys of array $array. This comparison function must return an integer.
Return Value: This function returns True on success or False on failure. Below programs illustrate the arsort() function in PHP. Program 1: php 
<?php
// PHP program to illustrate
// arsort() function
  
// Input different array elements
$arr = array("0" => "GeeksforGeeks",
             "1" => "Practice",
             "2" => "Contribute",
             "3" => "Java",
             "4" => "Videos",
             "5" => "Report Bug",
             "6" => "Article",
             "7" => "Sudo Placement"
        );

// Implementation of arsort()
arsort($arr);
 
// for-Loop  for displaying result
foreach ($arr as $key => $val) {
    echo "[$key] = $val";
    echo"\n";
}

?>
Output: 
[4] = Videos
[7] = Sudo Placement
[5] = Report Bug
[1] = Practice
[3] = Java
[0] = GeeksforGeeks
[2] = Contribute
[6] = Article
Program 2: php 
<?php
// PHP program to illustrate
// arsort() function
   
// Input different array elements
$arr = array("a" => 11,
             "b" => 22,
             "d" => 33,
             "n" => 44,
             "o" => 55,
             "p" => 66,
             "p" => 77,
             "q" => 88,
        );
// Implementation of arsort()
arsort($arr);
  
// for-Loop  for displaying result
foreach ($arr as $key => $val) {
    echo "[$key] = $val";
    echo"\n";
}

?>
Output: 
[q] = 88
[p] = 77
[o] = 55
[n] = 44
[d] = 33
[b] = 22
[a] = 11
Related Articles: Reference: https://www.php.net/manual/en/function.arsort.php

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